more accurately I feel like I have been drinking Tequila and smoking and clubbing all night!
I wish that was the cause of how I feel this morning Similar age and similar issues. I am almost falling asleep in the chair this morning because of the recent poor sleep and constant feeding overnight (and through the day but that is another post ) My little one - she is teething, she is developmentally reaching the sitting stage and is frustrated lying flat and resisting being held upright (wants to do it herself), she is vocalising and she is having another growth spurt Consequently, she isn't sleeping and neither am I. While it might not seem like she is doing anything different, she may be gearing up to it and that is enough to throw her sleeping off.

It does get better. I am hanging for the 6 month mark where they change again and sleep longer through the day (and night) and become more predictable for a little while.

Hang in there. It does get better